Sand revivifier



Deco 28 19%. 3,611,944

A. G. J. RAPP SAND REVIVIFIER Filed Dec. 24, 1925 2 Sheets-Sheet l Dem;a28 1926.

A. G. J. RAPP SAND REVIVIFIER Filed Dec. 24, 1925 2 Sheets-Sheet 2 ings,wherein:

Patented Dec. 28, 1926.

UNITED STATESPATENT OFFIE.

AXEL G. J. RAPP, OF CHICAGO, ILLINOIS, ASSIGNOR TO LINK-BELT COMPANY, OF

CHIC GO, ILLm'OIS, A CORPORATION OF ILLINOIS.

sane nnvrvrrma.

Application filed December 24, 1925. Serial No. 77,501.

My invention relates to improvements in a sand heater or sand mixer orin machines which may be used for heating or mixing.

sand, coal or any other granular or finely divided material.

My machine is expected to take the material in question, which may befinely divided or may be wet and adhesive. The material is beaten orbroken and the particles separated by the violent blows of the beater.

One object of my invention is to break up or divide or separate thematerial in ques tion, particularly where the fine particles havegathered in lumps, or are bonded or held together by moisture. is theprovision of means for preventing the adherence of particles to thesides of the beater housing or casing. Other objects Wlll appear fromtime to time in the course of' the specification and claims. Iillustrate my invention more or less d1- agrammatlcally in theaccompanying draw- Figure 1 is a tion;

Figure 2 is a section on the line 22 of longitudinaly vertical sec-Figure 1; and

Figures 3 and 4 are longitudinal, vertical sections through variantforms of the device.

Like parts are indicated by like symbols throughout the description anddrawings.

A is any suitable foundation wall or member containing or supporting ahopper A ,A is acircumferential centering or securing flange to whichmay be secured a casing or housingmember B. Supported without the wallof suchhousin forexample in the bearing members 7 1 is .,the

beater shaft B provided with a pulley B about which passes the drivingbelt B which may be driven *friom any suitable power "source not hereinshown.- B are the side walls of the housing B, apertured as at B topermit the passage of the beater shaft and the members mounted thereon.

The shaft is squared as at C and secured to the squared portion is abeater hub C from which .project outwardly a series of beater arms CThese. beater arms are relatively -fiat members having plane facesinclined to planes perpendicular to the axis of rotation ofthe beatershaft.

At the extremities of, the hub C are Another object mounted discs Dprovided with radially positioned outwardly projecting vanes D having aslight clearance from the side walls B of the housing. D are any suitable spacing or securing members for such discs D, their outer facesbeing in "contact with spacing washers I) about the rounded portions ofthe shaft 13 Positioned generally in the vertical plane of the beatershaft is a feed hopper E associated with the upper portion of thehousingB and adapted to deliver the material to be beaten to the beating zonedefined by the radial extension of the beater arms C Mounted upon thetop B of the casing B is an abutment member G apertured to 7 permit thepassage of a plurality of bolts G to the outer extremities of which arescrew' threaded the securing nuts G The inner end of each bolt isfastened, for example, by the bolts G and nuts G*. to the upper endofa'belt member G. This belt passes downwardly about the small tube orcylinder G its lower end being secured as at G to the edge of the hopperA It will be understood that I prefer to employ a relatively largenumber of parallel belts in -indefinitely varied to suit the conditionsdesired. may employ a variety of materialsfor such belts, but prefer theordinary trade belting. 1

If found desirable, and as illustrated in Figures 1 and '2, the sides,or a portion of the sides of the housing may also be formed byaplurality of vertically positionedbelt members 11,. secured at theirlower 'ends as at H along theedge of the hopper A and held attheir upperends by belt tightening bolts H similar to the already described bolts Gwhich pass through the abutment members 11*, and serve to draw the upperends of the beltsabout the cylinders H.

Referring to Figure 3, in the place of the.

single beater illustrated in Figures 1 and2,

I employ a plurality ofbeater shafts I, I

rotating in opposite directions, each ha ill a heater huh I with theoutwardly prodividual belt members I I at the opposite ends of thehousing may be identical in de-v tail with those shown in great detailin Figure 1. Either one or two delivery hoppers may be used, two beingshown.

Referring to Figure 4, I illustrate a'single beater shaft K with the hubK the beater bars K the discs K and the vanes K. In this form of mydevice, also, as in Figure 3 I position belt members K K at each end ofthe housing.

It will be realized that whereas I-have illustrated a pratical andoperative device that nevertheless many changes may vbe made in thesize, shape, number and disposition of parts without departing from thespirit of my invention and that I wish my drawings to be taken as in abroad sense diagrammatic and illustrative rather than as limiting me tothe specific description and showing herein made.

The use and operation of my invention are as follows:

Material such -as sand,dust, coal or the like, which is to'be broken upor mixed, is fed into the hopper or hoppers at the top of the var ousforms of my device. One phase of my invention, most broadly stated,consists in the employment of a beatingzone and of an arresting memberwhich vibrates in response to the impact of the material projected fromthe beating zone.

Referring particularly to Figures 1 and 2. as the material is fedthrough the hopper E it passes into the beater zone formed by therapidly rotating beating arms. All the material as it falls is struck bythe beater arms or paddles and is projected suddenly against the belts GIt will be understood that the individual belt members are all tightlyheld by the belt tighteners G Owing to their length and the flexiblematerial of which they are made they vibrate or quiver under the impactof the finely divided material and the continuous projection of suchmaterial thereagainst keeps them in a relatively constant vibration ofsuflicient intensity to shake from them such material as might otherwiseadhere. Any desired number of belts may be used, from a single belt or apair of belts to a multiplicity of narrow belts. The belts, when morethan one is used, abut againsteach other and are so closely spaced thatthe volume of material which passes through the interstices isnegligible. In fact the result is a double separating action. Thematerial is to a very large extent broken up by the impact of thebeating arms. Some of it fallsor isthrown into the hopper A withoutactually reaching the end of the housing or the belts B Such of it asreaches the belts is subjected to the vibratory action of the belts andnot only is kept from adhering to the belts but is further broken up, ifnot already entirely reduced to its desirable fineness.

It will be understood that the material handled is already finelydivided but that, by the addition of Water or otherwise. it has -formedin lumps or cakes or may be in a muddy, slimy condition. This isparticularly the case with fine sand used in casting.

Under some circumstances I find it desirable to form the sides of thecasing of a belt section or a plurality of belt sections H similarlysupported and tightened. These have, although to a smaller extent, thesame property of resist ng the adherence of the material. Theirvibration is,'of' course. less since they do not so directly receive theimpact of the projected material.

*leferring to the Figure 3 I illustrate a plurality of heaters and aplurality of hoppers. each beater directing the material which passesthrough its hopper against the tightened belt sections 1 or Irespectively. The action is identical with the beater of Figure 1 butthe capacity is of course increased. I may also, if I wish, reverse thedirection of rotation of the two beater shafts and cause the heaters tothrow the material against each other, thus passing the material throughtwo beating zones and also promoting separation or breaking up of lumpsby opposing the two streams of such material.

referring to Figure 4 I illustl ate a single beater and hopper butn'iininiizc the tendency of the material to adhere to the ends of thehousing by employing belt members K and K" at each end of the housing.

In each of the forms employed I use at each end of the beater shaft orhub a pair of discs spaced slightly from the inner face of thehousingwalls. These discs are provided with vanes having a slight clearancefrom such walls. In response to the rapid rotation of the beater shaftsthese discs and their vanes act as fans or blowers and effectively clearthe inner face of the housing from any adhering material. This clearingaction-extends about the ent re area of the disc and for a distance of anumber n inches outwardly from the periphery of "ie disc. In the form ofFigure 1 the disc is therefore able to scour the inner walls of thehousing on each side through a very substantial portion of their area.Such areas of the Walls as are beyond the range of this scouring effectare, as shown in Figure 1, formed of vertical belt lengths.

The same scouring effect takes place in the forms of Figures 3 and 4 andsince the interiorwalls of the housing sides are air llt) of thematerial propelled by the beater, and

means for maintaining such strip under tension.

2. In a heater, a housing open at the bottom and closed at sides andtop. a feed memher at the top, a heater member within the housing, andmeans for rotating it, and material arresting means comprising aplurality of strips of flexible material positioned side by side andextending across the path ofthe material propelled by the beater.

3. In a beater, a housing open at the bottom and closed at sides andtop, a feed member at the top, a beater member within the housing. andmeans for rotating it, and material arresting means comprising 'a stripof flexible material extending across the path .of the materialpropelled by the beater. and adjustable means for exerting tensionthereupon.

4. In a heater, a housing open at the bottom and. closed at sides andtop, a feed memher at the top, a-beater member within the.

housing, and means for rotating it, and material arresting meanscomprising a plurality of strips of flexible material positioned side byside and extending across the path of the material propelled by thebeater. and adjustable means for exerting tension thereupon. i

5. In a heater, a housing ,open at the bottom and closed at sides andtop, a feed member at the top, a beater member within, the housing, andmeans for rotating-1t," and material arresting'means comprising a;plurality V of. strips of flexible material positioned side by side andextending across the path of thematerial propelled by the beater. thestripsextending from the housing top downwardly to the plane of thehousing bottom, and being inclined downwardly and outwardly away fromthe beater zone;

6. In a heater, a housing open at the bottom and closed at sides andtop, a feed member-at the housing top, a beater member within thehousing and means for rotating it, material arresting means positionedat an end of the housing, comprising a plurality of flexible beltlengths positioned side by side across the path of material propelledthe beater, the belt lengths'being ane 0 red at their bottoms andextending upwardly to and through the top of the housing, and belttightening members, upon the housing top, in engagement with the ends ofsaid belts.

7. In a beater, a housing, a feed member at the top of the housing, areceiving member positioned beneath the housing, a beater member withinthe housing and means for rotating 1t, and a flexible arresting meansextending across the path of the material 9. In a beater, a housing, afeed member at the top of the housing, a receiving member positionedbeneath the housing. a beater member within the housing and means forrotating it, at flexible tensional arresting means extending across thepath of the material propelled by the beater, and means for adjustingthe tension thereof.

10. In a heater, a housing open at the botlit torn and closed at sidesand top, a feed member at the top, ,a heater member within the housing,and means for rotating it, and material arresting means at each end ofthe housing, comprising a strip of flexible ma terial extending acrossthe path of the material propelled bv the heater, and means for;maintaining such' strip under tension.

11. In a heater, a housing open at the bottom and closed at sides andtop, a feed member at the top, abeater member within the hous ng, andmeans for rotating it, and material arresting means at each end: of. thehousing, comprising a plurality of strips of flexible materialpositioned side'by side and extending across the path of the material'propelled by the beater.

12. In a heater. a housing, a plurality of feed members at the top ofthe housing. a receiving member positioned beneath the housing, aplurality of beater members within the housing and means for rotatingthem and separate flexible arresting means extending across the path ofthe material propelled by each beater. 13. In a heater, a housing. aplurality offeed members at the top of the housing, a receiving memberpositioned beneath the housing, a plurality of beater members within thehousing and means for rotating them hit:

and flexible arresting means extending across I the path of the materialpropelled by the beater, comprisin a plurality of flexible belt lengthspositioned side by side. across each end of the housing.

14 In a heater, a housing, a feed member at the top ofthe housing, areceiving member positioned beneath the housing, a heater within thehousing and means for rotating it. and concentrically rotating meansassociated with said beater member for directingcleansing currents ofair across the inner face of the housing about each end of the beater.

15. In a beater, a housing, a feed member at the top of the housing, areceiving member positioned beneath the housing, a heater within thehousing and means for rotating it, and concentrically rotating meansassociated with said beater member for directing cleansing currents ofair across the inner face of the housing about each end of the beater,comprisingfan members positioned at each end of thebeater member.

16. In a beater, a housing, a feed member at the top of the housing, areceiving meniber positioned beneath the housing, a heater within thehousing and means for rotating it, and means associated with said beatermember for directing cleansing currents of air across the inner face ofthe housing about each end of the beater, comprising discs positioned ateach end of the beater member and vanes projecting therefrom toward thehousing wall.

17. In a beater, a housing, a feed member at the top of the housing, areceiving mem ber positioned beneath the housing, a beater member withinthe housing andmeans for rotating it, and a flexible arrestingmeansextending across the path of the material propelled by thebeater, saidhousing having flexible, lateral Wall sections.

18. In a beater, a housing, a feed member at the top of the housing, areceiving member positioned beneath the housing, a beater member Withinthe housing and means for rotating it, and a flexible arresting meansextending across the path of the material flexible wall sections.

20. In abeater, a. housing, a. feed member at the top of the housing, areceiving member positioned beneath the housing, a beater member Withinthe housing, and means for rotating it, such housing comprising in partflexible wall sections, such flexible sections consisting of a pluralityof belt lengths positioned side by side.

21. In a beater, a housing, a heater member within the housing and meansfor rotating it, and a tensional vibratory arresting member adapted tovibrate in response to the impact of material delivered by the beatermember.

22. In a beater, a housing, a beater member within the housing and meansfor actuating it, and a tensional vibratory arrestin member adapted tovibrate in response to the impact of material delivered by the beatermember.

23. In a heater, a housing, a heater member Within the housing and meansfor rotating it, and a plane surfaced tensional vibratory arrestingmember adapted to vibrate in response to the impactI of materialdelivered by the beater member.

24. In a beater, a housing, a beater member within the housing and meansfor rotat ing it, and a plane surfaced, tensional vibratory arrestingmember adapted to vibrate in response to the impact of materialdelivered by the beater member, and means for adjusting the tensionthereof.

25. In a beater, a housing, a beater member Within the housing and meansfor rotating it, and a vibratory arresting member adapted to vibrate inresponse to the impact of the material delivered by the beater member, areceiving member positioned beneath the beater member and the vibratorymemv ber, the vibratorymember being upwardly and inwardly inclined fromone edge of said receiving member toward and above said beating member.

26. In a heater, a housing, a horizontally axised beater member withinthe housing, and means for rotating it, a material receiving meanspositioned beneath said beater and a vibrating arresting member adaptedto vibrate in response to the impact of the material delivered by thebeater member, inclined upwardly and inwardly across said materialreceiving means in line with the path of the material delivered by saidbeater.

Signed at Chicago county of Cook and State of Illinois, this 15th day ofDecember,

Y AXEL G. J. RAPP.

